結果

問題 No.2141 Enumeratest
ユーザー dyktr_06dyktr_06
提出日時 2022-12-02 21:47:31
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 156 ms / 2,000 ms
コード長 5,618 bytes
コンパイル時間 2,035 ms
コンパイル使用メモリ 170,160 KB
実行使用メモリ 50,076 KB
最終ジャッジ日時 2024-10-09 22:58:05
合計ジャッジ時間 4,906 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,248 KB
testcase_02 AC 14 ms
9,472 KB
testcase_03 AC 60 ms
26,624 KB
testcase_04 AC 156 ms
50,076 KB
testcase_05 AC 66 ms
26,668 KB
testcase_06 AC 2 ms
5,248 KB
testcase_07 AC 6 ms
5,376 KB
testcase_08 AC 19 ms
11,648 KB
testcase_09 AC 13 ms
8,704 KB
testcase_10 AC 31 ms
16,472 KB
testcase_11 AC 54 ms
24,492 KB
testcase_12 AC 4 ms
5,248 KB
testcase_13 AC 12 ms
8,192 KB
testcase_14 AC 52 ms
24,064 KB
testcase_15 AC 29 ms
15,360 KB
testcase_16 AC 36 ms
18,432 KB
testcase_17 AC 80 ms
32,000 KB
testcase_18 AC 73 ms
28,672 KB
testcase_19 AC 122 ms
41,216 KB
testcase_20 AC 73 ms
29,568 KB
testcase_21 AC 82 ms
31,488 KB
testcase_22 AC 53 ms
22,656 KB
testcase_23 AC 30 ms
15,488 KB
testcase_24 AC 70 ms
30,080 KB
testcase_25 AC 18 ms
11,008 KB
testcase_26 AC 60 ms
25,216 KB
testcase_27 AC 74 ms
29,184 KB
testcase_28 AC 91 ms
32,640 KB
testcase_29 AC 43 ms
19,584 KB
testcase_30 AC 118 ms
40,576 KB
testcase_31 AC 73 ms
28,672 KB
testcase_32 AC 95 ms
34,944 KB
testcase_33 AC 62 ms
26,112 KB
testcase_34 AC 93 ms
34,048 KB
testcase_35 AC 7 ms
5,632 KB
testcase_36 AC 88 ms
32,768 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'void in(T& ...)':
main.cpp:28:55: warning: fold-expressions only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   28 | template<class... T> void in(T&... a){ (cin >> ... >> a); }
      |                                                       ^
main.cpp: In function 'void out(const T&, const Ts& ...)':
main.cpp:30:112: warning: fold-expressions only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   30 | template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
      |                                                                                                                ^

ソースコード

diff # 

#include <bits/stdc++.h>

using namespace std;

#define rep(i,n) for(int i = 0; i < (int)(n); ++i)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; --i)
#define ALL(a) a.begin(), a.end()
#define Sort(a) sort(a.begin(), a.end())
#define RSort(a) sort(a.rbegin(), a.rend())

typedef long long int ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<char> vc;
typedef vector<string> vst;
typedef vector<double> vd;
typedef pair<long long, long long> P;

const long long INF = 0x1fffffffffffffff;
const long long MOD = 998244353;
const long double PI = acos(-1);
 
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<class T, class U> inline T vin(T& vec, U n) { vec.resize(n); for(int i = 0; i < (int) n; ++i) cin >> vec[i]; return vec; }
template<class T> inline void vout(T vec, string s = "\n"){ for(auto x : vec) cout << x << s; }
template<class... T> void in(T&... a){ (cin >> ... >> a); }
void out(){ cout << '\n'; }
template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T, class U> void inGraph(vector<vector<T>>& G, U n, U m, bool directed = false){ G.resize(n); for(int i = 0; i < m; i++){ int a, b; cin >> a >> b; a--, b--; G[a].push_back(b); if(!directed) G[b].push_back(a); } }


template <long long Modulus>
struct ModInt{
    long long val;
    constexpr ModInt(const long long &_val = 0) noexcept : val(_val) {
        normalize();
    }
    void normalize(){
        val = (val % Modulus + Modulus) % Modulus;
    }
    inline ModInt& operator+=(const ModInt& rhs) noexcept {
        if(val += rhs.val, val >= Modulus) val -= Modulus;
        return *this;
    }
    inline ModInt& operator-=(const ModInt& rhs) noexcept {
        if(val -= rhs.val, val < 0) val += Modulus;
        return *this;
    }
    inline ModInt& operator*=(const ModInt& rhs) noexcept {
        val = val * rhs.val % Modulus;
        return *this;
    }
    inline ModInt& operator/=(const ModInt& rhs) noexcept {
        val = val * inv(rhs.val).val % Modulus;
        return *this;
    }
    inline ModInt& operator++() noexcept {
        if(++val >= Modulus) val -= Modulus;
        return *this;
    }
    inline ModInt operator++(int) noexcept {
        ModInt t = val;
        if(++val >= Modulus) val -= Modulus;
        return t;
    }
    inline ModInt& operator--() noexcept {
        if(--val < 0) val += Modulus;
        return *this;
    }
    inline ModInt operator--(int) noexcept {
        ModInt t = val;
        if(--val < 0) val += Modulus;
        return t;
    }
    inline ModInt operator-() const noexcept { return (Modulus - val) % Modulus; }
    inline ModInt inv(void) const { return inv(val); }
    ModInt inv(const long long& n) const {
        long long a = n, b = Modulus, u = 1, v = 0;
        while(b){
            long long t = a / b;
            a -= t * b; swap(a, b);
            u -= t * v; swap(u, v);
        }
        u %= Modulus;
        if(u < 0) u += Modulus;
        return u;
    }
    friend inline ModInt operator+(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) += rhs; }
    friend inline ModInt operator-(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) -= rhs; }
    friend inline ModInt operator*(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) *= rhs; }
    friend inline ModInt operator/(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) /= rhs; }
    friend inline bool operator==(const ModInt& lhs, const ModInt& rhs) noexcept { return lhs.val == rhs.val; }
    friend inline bool operator!=(const ModInt& lhs, const ModInt& rhs) noexcept { return lhs.val != rhs.val; }
    friend inline istream& operator>>(istream& is, ModInt& x) noexcept {
        is >> x.val;
        x.normalize();
        return is;
    }
    friend inline ostream& operator<<(ostream& os, const ModInt& x) noexcept { return os << x.val; }
};

struct Combination{
    vector<long long> memo, memoinv, inv;
    const long long mod;
    Combination(const int &N, const long long &m) : memo(N + 1), memoinv(N + 1), inv(N + 1), mod(m){
        memo[0] = memo[1] = 1;
        memoinv[0] = memoinv[1] = 1;
        inv[1] = 1;
        for(int i = 2; i <= N; ++i){
            memo[i] = memo[i - 1] * i % mod;
            inv[i] = mod - inv[mod % i] * (m / i) % mod;
            memoinv[i] = memoinv[i - 1] * inv[i] % mod;
        }
    }
    inline long long fact(const long long &n) const {
        return memo[n];
    }
    inline long long factinv(const long long &n) const {
        return memoinv[n];
    }
    inline long long ncr(const long long &n, const long long &r) const {
        if(n < r || r < 0) return 0;
        return (memo[n] * memoinv[r] % mod) * memoinv[n - r] % mod;
    }
    inline long long npr(const long long &n, const long long &r) const {
        if(n < r || r < 0) return 0;
        return (memo[n] % mod) * memoinv[n - r] % mod;
    }
};

ll n, m;
using mint = ModInt<998244353>;

void input(){
    in(n, m);
}

void solve(){
    Combination comb(n + m, MOD);
    ll d = m / n;
    ll e = m % n;
    mint ans = 1;
    rep(i, n){
        if(i < e){
            ans *= comb.ncr(m, d + 1);
            m -= d + 1;
        }else{
            ans *= comb.ncr(m, d);
            m -= d;
        }
    }
    out(ans);
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    input();
    solve();
}
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